scherzo n.

in music, "passage or movement of a light and playful character," 1852, from Italian scherzo, literally "sport, joke," from scherzare "to jest or joke," from a Germanic source (compare Middle High German scherzen "to jump merrily, enjoy oneself," German scherz "sport"), from PIE *(s)ker- (2) "leap, jump about." Especially the lively second or third movement in a multi-movement musical work. Scherzando in musical instruction is the Italian gerund of scherzare.